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<p class="header"><a class="header" href="intro.htm">Orbiter</a> &gt; <a class="header" href="mfd.htm">MFD</a> &gt; COM/NAV</p>

<h1>COM/NAV MFD</h1>

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<td width=50% align=center><a href="mfd_com_ctrl.htm">Controls</a></td>
<td width=50% align=center><a href="mfd_com_disp.htm">Display components</a></td>
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<p>The COM/NAV MFD mode provides an interface to the ship's navigation radio receivers which feed data to the navigation instruments. It also allows to select the frequency of the ship's transponder which sends an signal to identify the vessel.</p>

<p>The COM/NAV mode is activated by <kbd class="ctrl">Shift</kbd> <kbd>C</kbd> or via the Comms entry from the MFD mode menu ( <kbd class="ctrl">Shift</kbd> <kbd class="ctrl">F1</kbd> ).</p>

<p>The MFD lists frequency and signal source information for all NAV radios (NAV1 to NAV<i>n</i>). The number of receivers (<i>n</i>) depends on the vessel class. A NAV receiver can be selected from the list by <kbd class="ctrl">Shift</kbd> <kbd>,</kbd> and <kbd class="ctrl">Shift</kbd> <kbd>.</kbd>. The selected receiver is highlighted i yellow.</p>

<p>The frequency of the selected receiver/transmitter can be tuned in steps of 1kHz with <kbd class="ctrl">Shift</kbd> <kbd>-</kbd> and <kbd class="ctrl">Shift</kbd> <kbd>=</kbd>, and in steps of 0.05kHz with <kbd class="ctrl">Shift</kbd> <kbd>[</kbd> and <kbd class="ctrl">Shift</kbd> <kbd>]</kbd>, in the range from 85.00kHz to 140.00kHz. If a compatible NAV transmitter is within range, the instrument displays information about the signal source.</p>

<p><b>Notes:</b></p>

<p><ul>
<li>Certain instruments such as the Launch/Land MFD mode are slaved to a NAV receiver, and will only work if a suitable signal is available.</li>
<li>The <i>Object Info</i> ( <kbd class="ctrl">Ctrl</kbd> <kbd>I</kbd> ) and <i>Navaid Info</i> dialogs ( <kbd class="ctrl">Ctrl</kbd> <kbd>N</kbd> ) are useful tools to obtain frequencies for navaid transmitters such as VOR and ILS beacons or vessel transponders.</li>
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